Aluminum, three parts

8 ft. 9 1/2 in. x 29 3/4 in. x 1 in. (268 x 75.6 x 2.5 cm)
7 ft. 1 in. x 7 ft. 9 1/2 in. x 1 in. (215.9 x 237.5 x 2.5 cm)
7 ft. 1 in. x 7 ft. 5 in. x 1 in. (215.9 x 226.1 x 2.5 cm)

Courtesy Ellsworth Kelly Studio

Photo by Jeffrey Jenkins